Well, older implements that don't fit because sizes are not standardized is part of the problem. So, I converted them, though it was just luck that the could be converted at all.
Then there is the problem with newer implements (~4 yrs old). In my case a simple rotary mower that won't work as well. It wouldn't work with the original toplink because that was a floppy thing that would allow the tail of the mower to rise when going over a bump. Removing that and using a fixed pin is simple enough, but the lower hooks are blocked from engagement by reinforcing gussets that are part of the mower's structural support. I could get a cutting torch and cut the gussets. but that would weaken the whole operation. And then I have to come up with someway of allowing the top-link play so I don't bridge the mower when coming down off a rise. Doable, but a PITA. And that doesn't solve the gusset problem.
And then there is the issue that for all implements, the top link has to be adjusted right or it will over- or undershoot the top link hook up when the side-link hooks are aligned, so I have to get off the tractor most of the time anyway. No big deal really but it somewhat defeats the purpose of the QH. Nothing a couple hundred or more wouldn't fix with the installation of rear remotes (more than the two already in use) and a hydro top link.
What would have been better, in hindsight, would be quick-links or whatever they are called that allows one to slide each side link ball out to engage and then snap into place when the tractor is backed up after connection. I may go this route yet.
